The IAP15W413AS is an electronic part manufactured by STC that is an integrated circuit in a Thin Shrink Small Outline Package (TSSOP) with 28 pins surrounded by a RoHS-compliant plastic encapsulation. It is used as a microcontroller, as is suitable for use in smart wearables and small embedded systems. It features a 4kB ROM, 1kB RAM, and a 2-channel PWM. It is a low power 8-bit MCU with an operating voltage range of 3.0V to 5.5V, with a maximum operating frequency of 24MHz. It has one 8-bit timer/counter, one full-bridge PWM, two 8-bit GPIO ports and two 16-bit USARTs.